From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Blueprint graph comparing the acceleration of various Bentley and Phantom models against road speed.
| Identifier | ExFiles\Box 21\2\ Scan022 | |
| Date | 1st August 1926 guessed | |
| COMPARISON OF R.R. AND BENTLEY 6 1/2 Litre CARS Accn. ft/sec^2 ROAD SPEED M.P.H 6 1/2 Litre BENTLEY BENTLEY REPLACING 17 EX SPORTS PHANTOM 16 EX STANDARD PHANTOM TOURER | ||